3 Commits

Author	SHA1	Message	Date
Adhemerval Zanella	95a01ea955	math: Use atanpif from CORE-MATH ... The CORE-MATH implementation is correctly rounded (for any rounding mode) and shows better performance to the generic atanpif. The code was adapted to glibc style and to use the definition of math_config.h (to handle errno, overflow, and underflow). Benchtest on x64_64 (Ryzen 9 5900X, gcc 14.2.1), aarch64 (Neoverse-N1, gcc 13.3.1), and powerpc (POWER10, gcc 13.2.1): latency master patched improvement x86_64 66.3296 52.7558 20.46% x86_64v2 66.0429 51.4007 22.17% x86_64v3 60.6294 48.7876 19.53% aarch64 (Neoverse) 24.3163 20.9110 14.00% power8 16.5766 13.3620 19.39% power10 16.5115 13.4072 18.80% reciprocal-throughput master patched improvement x86_64 30.8599 16.0866 47.87% x86_64v2 29.2286 15.4688 47.08% x86_64v3 23.0960 12.8510 44.36% aarch64 (Neoverse) 15.4619 10.6752 30.96% power8 7.9200 5.2483 33.73% power10 6.8539 4.6262 32.50% Reviewed-by: DJ Delorie <dj@redhat.com>	2025-02-12 16:31:57 -03:00
Paul Zimmermann	e5ca265a9c	new inputs with large errors for [a]cospi, [a]sinpi, [a]tanpi, atan2pi ... These inputs were generated with the programs from https://gitlab.inria.fr/zimmerma/math_accuracy, with rounding to nearest: * for univariate binary32 functions by exhaustive search * for other functions with the "threshold" parameter up to 10^6	2025-01-02 18:26:36 +01:00
Joseph Myers	ffe79c446c	Implement C23 atanpi ... C23 adds various <math.h> function families originally defined in TS 18661-4. Add the atanpi functions (atan(x)/pi). Tested for x86_64 and x86, and with build-many-glibcs.py.	2024-12-11 21:51:49 +00:00